Spring motor



Nov. 22, 1927.

L. s, 'GUNDERMAN SFRiNG MOTOR Filed June so, 1925 Patented Nov. 22, 1927.

2 UNITED STATES PATENT OFFICE.

srnmo MOTOR.

Application filed June 30, 1925. Seri'atNo. 40,490.

This invention relates to means of attaching springs to shafts. More particularly it relates to means for attaching a fiat spr ng to a winding axle for driving a toy motor.

The object of this invention is toprovide simple means forattaching vfiat springs to winding shafts, in such a manner that it prevents the shaft from moving horizontally without extra collars or some other device.

Although this invention is adapted to any .form of driving shaft, it is particularly valuable and applicable to the fiat spring for winding shafts for toy motors. These toy motor springs and shafts arenow manufactured and used extensively, but there has been no means yet devised, so far as I am aware, for attaching them to the shafts in such a manner that they will be used for preventing the shafts from moving horizontally. In the drawing Fig. 1 is a front View of a spring motor.

Fig. 2 is a part section on line A-A in Fig. 1.

Fig. 3 is an enlarged view of the winding shaft.

Fig. 1 is an enlarged View of the retaining spring.

Fig. 5 is a view of the spooling washer. The spring motor comprisesframe members 7 and 8. J ournaled in the frame is a shaft 9, for the purpose of winding the spring 10, when one end of the spring is.

passed through the rectangular openlng 11, in shaft 9. Formerly it was the custom to fasten the end of the spring over an extra formedloop slipped over the shaft, and then bending the spring to slip over the loop or by piercing a hole in the end of the spring and hooking it over a projection on the shaft, such as in clock mechanism. This required a material amount of time comparatively speaking, and was of some difficulty in assembling and also caused the spring to have an eccentrical winding and unwinding.

On each side of the spring 10, are washers 12 to hold the spring in line when being wound. In fastening the spring '10 to the shaft 9 one end of. the spring is passed through the slot 11 between the washer 12, then by turning the shaft the spring 10 will be evenly wound upon the shaft, and kept from unwindingby the coiled spring 13, the coils of the spring being in such a manner that the unwinding of the spring 10 tightens the coils of the spring 13. The. outer 111163118 for preventing lateral movement end 14 of the spring 13being fastened to the driving gear 15 by lugs 16. It will be seen that the entire space between the frame members 7 and 8 on the shaft 9 bein taken up by the spring 10, washers 12, coile spring 13, and gear 15, the end of the spring 10 passing through the opening and'wound on the shaft 9 will act as a key preventing the shaft 9 from moving horizontally in the frame members 7 and 8. These two frame members when in position their inside surfaces reinforce the members on the shaft 9 to keep them in a position on the said shaft.

Since the rest of the motor may be of any desirable and commercial type, it will not be described in detail as its specific structure forms no part of myv invention.

Iclaim:

1. The combination with a driving spring adapted to bewound upon a motor shaft by a slot therein, a washer on each side of the driving spring, a" retaining spring together with a driving gear on the said shaft, the breadth between the motor frame being equal to the said members on the winding shaft to prevent the longitudinal movement of the said windingshaft.

2. The combination with ,a spring motor and a winding shaft having a parallel slot therein, a drivingspring one end fastened in said slot, a washer mounted on the winding shaft'on each side of the driving spring, a retaining spring and a driving gear mounted on the said winding shaft, the breadth between the motor frame at the said winding shaft being equal to the said members mounted on the. said winding shaft to prevent the longitudinal movement thereof.

3. The combination with a spring motor having a shaft with a rectangular pierced hole therein, a driving spring adapted to be fastened in said hole. a coiled-spring mounted on said shaft, the driving spring preventing the coiled spring from creeping towards the end of the shaft.

4. The combination with a spring motor and a winding shaft having a parallel slot therein, a driving spring having one end fastened therein, a washer mountedon the shaft, a coiled spring mounted on the winding shaft, the driving spring constituting LESTER SQGUNDERMAN. 

